JPS59123130A - Relay drive circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a relay drive circuit that minimizes power consumption during operation of a relay. [Background Art] A device that reduces power consumption during operation of this persimmon relay has already been developed. exist.

For example, as in Publication No. 52-4iD2, a capacitor and a relay are connected directly, and after the switch is turned on, the capacitor is charged, and the relay maintains its current status after the completion of charging.
(setting or resetting) is performed by mechanical operation of if IJ relay, and the next switching is performed by discharging the capacitor and current flow.

Therefore, the above-mentioned relay had to be a special type, that is, a latching relay, and did not have the selectivity of the relay.

(Object of the Invention) The present invention has been made in view of the above-mentioned points, and is aimed at keeping the relay in a latching type, and minimizing the amount of stress and force during operation of the relay. It is.

[Disclosure of the invention]

(Example) The present invention will be explained based on the drawings as an example. 1 is a power supply, 2 is a relay 3 connected to this power supply 1.
With the coil 2, the contact 4 is switched once by excitation of the coil 2. 5 is a relay drive switch connected in series to the relay coil 2, specifically using a transistor,
An operation signal is applied to the control terminal B. Therefore, this switch 5 controls the current of the relay coil 2 by turning on and releasing the operation signal. 6 is a diode connected in parallel with the relay coil 2 in the opposite direction;
The back electromotive flow is made to flow for a certain amount of time. The drawings of the embodiments show an example of application to a sequencer in which several relays 6, switches 5, and diodes 6 are connected in parallel. Reference numeral 7 denotes an oscillation circuit interposed between the power supply 1 and the relay coil 2, which outputs an on/off signal. Reference numeral 8 denotes a timing switch for on/off signals of this oscillation circuit 7, which is a transistor. The timing is set so that the relay 6 completes its operation during the ON signal output time η, and the time during the OFF signal output time 1 is shorter than the time during which the back electromotive current passes through the diode 6 and the relay coil 2.

(3) (Operation) Next, we will explain the operation of the RAID drive circuit explained in this book.
In FIG. 1, when an operation signal is applied to the relay drive switch 5, the switch 5 is turned on, and the flow goes from the switch 1 to the switch 8.1 of the oscillation circuit 7, and from the coil 2 to the switch 5. Relay contact 4 operates.

In this case, the ON/OFF signal of the oscillation 1 path 7 is outputted by the switch 8 as shown in FIG.

That is, the operation of the relay 6 is completed during the ON No. 18 output time A.

Subsequently, when the switch 8 of the oscillation circuit 7 is turned off, 1. Since the supply of the source 1 is stopped, the relay coil 2 allows the back electromotive current to flow through the diode 6 and maintains the contact 4 in the above-mentioned 1-operation state.

The off time T2 of the oscillation circuit 7 is shorter than the time during which this back electromotive current is flowing, so the relay 2 continues its operation by the next off signal. Power consumption is low during the off time of this generation (4) 7.

Of course, if the drive switch 5 is turned off, the relay will stop operating regardless of the output of the oscillator circuit. Connect this relay coil 2 in parallel to the back electromotive force of the coil 2, and connect a diode 6 that allows the current to flow. Since the time during which the back electromotive current of the coil 2 flows through the diode 6 is made longer than during the off signal time, the operation of the relay during the off time of the oscillation circuit 7 can be maintained by the back electromotive current of the coil. Therefore, the power consumption of the relay is only during the ON signal output time of the oscillation circuit, and the relay is not limited to a special type such as a latching relay as in the past.

[Brief explanation of drawings]

The drawings show an embodiment of the relay drive path of the present invention, FIG. 1 is a circuit diagram, and FIG. 2 is a waveform diagram (5). 1...tm, 2...relay, 6...coil, 4...
... Contact, 5... Drive switch, 6... Diode, 7... Oscillator 1 Patent applicant Matsu') Kameko Co., Ltd. agent "FF Physician Toshimaru Takemitsu (2 people) ( 6)

Claims (1)

[Claims] (a υ power source, a relay coil connected to this power source, a diode connected in parallel to this relay coil and which causes a counter-frozen current to flow through the relay coil for a certain period of time, and a relay drive connected in series with this relay coil. The switch is further interposed between the relay coil source and the ON 4
The relay completes its operation during the H-signal output time, and the back voltage t that connects the diode and relay coil during the OFF signal time
A relay drive circuit characterized in that it is made up of an oscillation circuit that outputs an on/off signal that is shorter than the vft time.